活性Al_2O_3对水中Ni(Ⅱ)的等温吸附行为研究

Study on isothermal adsorption behaviours of the active alumina to Ni(Ⅱ) species in aqueous solution

研究了Ni2+浓度为72.37-708.79 mg.L-1水溶液中,温度、pH值对活性Al2O3静态吸附Ni(Ⅱ)行为的影响。结果表明,实验条件下,活性Al2O3静态吸附Ni(Ⅱ)的行为符合Langmuir等温吸附方程,吸附热Q为17.1 kJ.mol-1。30℃,pH为6时,Langmuir等温吸附方程为Ce/qe=0.0255Ce+0.0002,饱和吸附量为39.22 mg.g-1。

The static adsorption behavior of active Al2O3 for Ni （ II ） species was studied in aqueous solution （ concentration of Ni （ II ） species was in 72. 3666 - 708. 7887mg · L^-1 ）. The results showed static adsorption of active Al2O3 for Ni （ II ） species fitted Langmuir adsorption isothermal model under experiment conditions and adsorption heat was 17. 10kJ · mol^-1. The Langmuir equation showed as Ce/qe = 0. 0255 Ce ＋ O. 0002 and the maximum value of Ni （ 11 ） adsorption on active Al2O3 is 39.22 mg · g^-1 at 30℃ and pH =6.